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The active site of TenA with the conserved cysteine. A stereodiagram is shown of the superposition of the THI20 TenA-like active site (green C atoms) with that of B. subtilis TenA (white C atoms). The residue numbers given correspond to the THI20 sequence and the B. subtilis TenA sequence (in parentheses). The HMP molecule (gray) is from the B. subtilis TenA structure. In both cases, O atoms are colored red, N atoms are colored blue and S atoms are colored yellow.
